ive got an 04 audi a3 2.0tdi,last thurday the intercooler pipe decided to blow off so i cleaned the egr valve and put the pipe back on hoping this would solve the problem, but its still not running like it should be,lack of power,like a growling/air leak kind of noise when i put my foot down. The more i try to put the power down black smoke starts to come out of the exhaust its running like its restricted and wont go above 2000rpm. Has anyone got any idea's that could help ? Thanks Dan